001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.master.balancer;
019
020import org.apache.hadoop.hbase.client.RegionInfo;
021import org.apache.yetus.audience.InterfaceAudience;
022
023@InterfaceAudience.Private
024public class SystemTableIsolationConditional extends TableIsolationConditional {
025
026  private final BalancerConditionals balancerConditionals;
027
028  SystemTableIsolationConditional(BalancerConditionals balancerConditionals,
029    BalancerClusterState cluster) {
030    super(new SystemTableIsolationCandidateGenerator(balancerConditionals), balancerConditionals,
031      cluster);
032    this.balancerConditionals = balancerConditionals;
033  }
034
035  @Override
036  boolean isRegionToIsolate(RegionInfo regionInfo) {
037    if (balancerConditionals.isMetaTableIsolationEnabled() && regionInfo.isMetaRegion()) {
038      // If meta isolation is enabled, we can ignore meta regions here
039      return false;
040    }
041    return regionInfo.getTable().isSystemTable();
042  }
043}